Starter quiz
- What is the basic particle theory?
- Matter is made of continuous matter.
- Matter is made of invisible substances.
- Matter is made of particles that are in constant motion. ✓
- Matter is made of tiny, unmovable particles.
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- What is a thermal energy store?
- the energy an object has due to its temperature ✓
- the energy transferred by light
- the energy stored in chemical bonds
- the energy transferred by sound waves
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- Which of these cause the energy in the thermal energy store to decrease?
- energy transferred by light
- increase in temperature
- increase in mass
- energy transferred to surroundings ✓
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- What happens to the particles a liquid is made of when it is cooled down to a lower temperature?
- The particles vibrate backwards and forwards more slowly. ✓
- The particles vibrate backwards and forwards faster.
- The particles vibrate backwards and forwards at the same speed.
- The particles decrease in size.
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- Starting with the least energy, put these in order of the energy in their thermal energy store.
- 1⇔1 g of water at 20°C
- 2⇔150 g of water at 20°C
- 3⇔1 kg of water at 20°C
- 4⇔1500 g of water at 20°C
- What happens to the energy a cup of tea has in the thermal store as it cools down?
- It is slowly used up.
- It is transferred to cooler objects in contact with it. ✓
- It is transferred to the surroundings. ✓
- It evaporates.
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Exit quiz
- What is a pure substance?
- a mixture of different particles
- a substance made out of identical particles with the same mass ✓
- a substance that cannot be heated
- a substance that changes state easily
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- How does heating transfer energy?
- from high to low temperature ✓
- from low to high temperature
- it does not transfer energy
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- Specific heat capacity is the property of a material that determines how much...
- energy a substance has.
- energy needs to be transferred to a substance to increase its temperature. ✓
- a substance heats up.
- a substance melts.
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- Why do particles in mixtures move at different speeds?
- because they are identical
- because they are the same mass
- because they do not move
- because they have different masses ✓
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- Starting with the least energy, put these in order of the energy in their thermal energy store:
- 1⇔ice at -10°C
- 2⇔water at 0°C
- 3⇔water at 50°C
- 4⇔steam at 100°C
Three metals balls of equal mass are heated in the oven for the same amount of time. Which metal has the lowest specific heat capacity?- iron
- aluminium
- copper ✓
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Worksheet
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Lesson Details
Key learning points
- It is easier to increase the temperature of some materials than others.
- The mass of particles and the attractive forces between particles are different in different substances.
- Different substances need different amounts of heating to reach the same temperature.
- The same amount of different materials at the same temperature can cause different amounts of heating.
- The higher the specific heat capacity, the more energy 1 kg of a substance has, at a temperature, in the thermal store.
Common misconception
Pupils rarely develop an intuitive understanding of what specific heat capacity means when it is introduced through an equation.
Use this lesson to develop a qualitative understanding of the specific heat capacity of objects, without introducing the equation for specific heat capacity.
Keywords
Heating - when energy transfers from high to low temperature
Specific heat capacity - the property of a material that determines how much energy needs to be transferred to it to increase its temperature
Thermal store - the energy a substance has because of the random motion of its particles
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